Experimental study on underwater acoustic imaging of 2-D temperature distribution around hot springs on floor of Lake Qiezishan, China

Short-Range Water Temperature Profiling in a Lake with Coastal Acoustic Tomography

“…A significant number of experiments have been conducted to measure range-average temperatures or map temperature distribution vertically and horizontally with CAT [15][16][17][18]. However, few researchers have attempted the short-range temperature observation, which may be used to monitor specific targets in small ranges, such as artificial upwelling and hydrothermal areas [15,19]. A higher frequency sound wave is needed for a high requirement of time resolution in short-range acoustic tomography research.…”

Ultrasonic temperature distribution reconstruction for circular area based on Markov radial basis approximation and singular value decomposition

“…Fortunately, temperature distribution can be reconstructed using appropriate reconstruction algorithm with multiple ultrasonic transducers (including transmitters and receivers) properly installed [10][11][12][14][15][16][17]. Fig.…”

“…Temperature distribution reconstruction using this technique is an inversion process, which depends greatly on reconstruction algorithm. Many algorithms have been proposed, such as algorithm based on least square method [14,15], algorithm based on interpolation and iterative [16], and algorithm based on RBF neural network [17]. However, due to problems of practicability like low accuracy, long time consumption, or poor applicability, they are seldom used in practice.…”

Acoustic tomography system for online monitoring of temperature fields

“…It is free from the decrease in penetration depth of the measurement device and easily applied to a gaseous medium, which is the major drawback of optical pyrometry. Recently, there has been considerable interest in applying acoustic travel-time tomography to monitoring temperature fields around seafloor hydrothermal vent [7] and in stored grain [8]. The sound probe can still work well in turbid seawater/hydrothermal fluid mixtures.…”